can someone please explain what black holes are..there purpose and how it is that they work?

Answer 1

A black hole is an area in space where a planet or star was believed to have imploded causing an area where the gravity is so dense and strong that even light rays are sucked toward it. They have been identified not because they are visible but because light waves passing by them are bent or drawn towards them.

Answer 2

Black holes are defined to be a region of space-time where escape to the outside universe is impossible. The outer boundary of this region is called the event horizon. Nothing can move from inside the event horizon to the outside, even briefly, due to the extreme gravitational field existing within the region. For the same reason, observers outside the event horizon cannot see any events which may be happening within the event horizon; thus any energy being radiated or events happening within the region are forever unable to be seen or detected from outside. A black holes can absorb anything. Within the black hole is a singularity, an anomalous place where matter is compressed to the degree that the known laws of physics no longer apply to it. Other than sucking everything up inm the universe, they have no purpose, they are just there because a star collapseds o much that it turned into one

Answer 3

A black hole is a region where space as we know it and can describe it stops. The boundary between normal space and that beyond it is known as the event horizon.

What is inside the event horizon is unknown but it was created by a lot of mass being in the same place and collapsing under its own gravity to a point where the speed required to escape it is more than the speed of light. The Event horizon simply marks the point of no return, even for light. What's beyond it we can never know as nothing can travel faster than light in free space.
With no light coming out, they look black. Well that's an oversimplification, the light gets redshifted beyond what is visible.
Black holes can be indirectly seen because the gravitational acceleration as materials fall to the event horizon causes them the materials to get very hot and emit light. They only go truly black at the event horizon, we can see stuff around them.

That's what they are and a bit of how they work. In a bit more depth, small stars become white dwarfs. This is because of quantum mechanics and the Pauli Exclusion principle which limits how electrons can behave. The electron pressure stops them from being crushed under their own immense weight. This will happen to the sun.
When the stellar relic is 1.4solar masses or more, gravity can crush the electron pressure. Quite a feat. The electrons get forced into nuclei to become neutrons. This creates neutron stars [we see them as pulsars].

The neutron pressure stops them from collapsing any further. One teaspoon of this stuff has a mass of the virtually the entire Royal Navy Fleet.

At three solar masses even neutron pressure cannot stop the gravitational pull of stuff. We don't know what happens. Physics cannot explain it. It crushes itself beyond our current understanding into an object we can never see inside to work out how it works.

Their purpose? Well it seems that all large galaxies have what are known as 'supermassive black holes' in their cores, maybe the mass of a billion suns. It seems that supermassive blackholes are critical in galaxy formation and that without them, there'd be no galaxies, no earth and nobody to be here to talk about it.

The smaller black holes, of which there are many floating around our galaxy of 3 to 50 solar masses [only] are mere unfortunate byproducts of the physics which allow everything to be here. They are of little consequence unless one decides to come our way but if you understand just how big space really is and how far apart black holes are you'll realise it's not worth worrying about.

Answer 4

A black hole is actually quite easy to understand. If you're standing on Earth, and you toss something up, obviously it comes back. We all know this because, what goes up must come down. But there's a speed with which you can throw something from Earth where it will never come back.

That speed is known as the escape velocity. Now, Earth's escape velocity is seven miles per second, which means that if you were somehow able to throw a baseball up at seven miles per second, it wouldn't come back down. And to launch a baseball from a black hole, you'd need some serious firepower.

For a black hole the escape velocity is the speed of light itself. And in fact, the speed of light is not even high enough to escape a black hole. So if you try to send up a beam of light, it'll just come right on back. Since light is the fastest thing we know, once you fall into a black hole, you're never coming out. Ever.

Answer 5

I love this kind of stuff. A black hole is an object predicted by general relativity, with a gravitational field so powerful that even electromagnetic radiation (such as light) cannot escape its pull. An interesting tidbit, a black hole the size of the period at the end of this sentence could destroy earth. The closest Black Hole to Earth is something like 15 million light years away, I think. Information cant even escape a black hole.

Answer 6

a black hole occurs in reality as a solution to an otherwise balance threathening phenomenone.it remains the consequential effect of an end.
when the generic life within a star is consumed kinetically, a change occurs within it's structural ambits that render it unstable.
this instability if unchecked could have dangerous explosive consequences. a black hole occurs when this star's mass uncontrolably gains to a point where it's density due to a higthened effect of pressure and then implodes.
in this scenario the the star could have been said to have exploded inwards thereby starting an ascendindg order of astute pressure which births a case of extreme entrophy [unavoidable inactivity]
now the entropy is so extreme that an object which gets sucked into the black hole compulsorily acquires the entropy.
so an object which gets sucked into a black whole if intelligent would realise that it has suddenly lost all it's inherent active capabilities and have been rendered into a state of gross heat , immobility and pressured timelessness.
the heat is consequently due to the fact that the birth of a black hole originates from an implossion[reversed explosion].

the immobility as a result of the the pressured inward continuum that is generated thereby increasing aerial desity and stealling surrounding vacuum every.
the pressure is in actuality a result of the singular nature of a black hole environs in the sence that the under such extremities,time and space is compressed into one and dimensional effects seizes to function as harbingers of events.__

Answer 7

I guess you have a good idea what black holes should be.
A black hole would be a useless entity that would eventually accrete all the matter in the universe and sit for eternity doing nothing.
The universe does not produce useless entities.
Contrary to the beliefs of many prominent scientists a black hole does not and cannot exist.

Answer 8

Stars have several key points in their lives, these include Super Nova, Red Dwarf, White Dwarf and Neutron Star. If a star a the white dwarf stage collapses one way it becomes a super Nova, but if it collapses the other way it becomes a black hole. Black Holes are like industrial vacuum cleaners in space, consuming entropie (eating dirt) and creating movement due to gravity.

Answer 9

black holes are, in theory dense dead stars, which have collapsed in on them selves, no light can leave them, they may be the engine that drives our galaxies, all of the stars of the milky way may be spinning around a black hole

Answer 10

their purpose?
Black holes are a natural phenomena - they don't have a purpose, they just are.
How they work is just gravity exactly the same as the 10m/s/s gravitational acceleration you are feeling at the moment.